The problem is that printer communications (especially over serial) have 
lacked a standardized protocol. Once printers started using network 
communications- they also started to create a universal protocol (see my 
IPP module https://github.com/williamwicks/ipp).

You will most likely need to find a serial/usb communication module you 
like- then look up the communication specs for each printer you want to 
use- and write something specific for each. You might have a really hard 
time finding the specs though.

Best of luck!
-William Wicks



On Thursday, September 26, 2013 4:22:35 AM UTC-7, 
[email protected] wrote:
>
> Hello,
>
> i was searching for a module for Printers and specially  raw printing to 
> thermal printers 'Zebra' by did not found a stable good one so any one can 
> help. also it will be much more btter if the module do the POS jobs like 
> serial com and barcode printing. thanks
>

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